A.G.
There is a puzzle store at the Alderwood Mall. (At least there was the last time I went. I'm not a frequent mall shopper.) The Fred Meyer near my house has a fairly decent selection of puzzles. I know they had some that were at least 1500 pieces. They also had some pretty challenging designs. I don't know if they are all like that, but since they are everywhere, it would be a good place to start.